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CVE-2024-6839

Improper Regex Path Matching in corydolphin/flask-cors

Published: Mar 20, 2025Updated: Nov 3, 2025 Sources: CVE List NVD GHSA BDUCWE-41
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.7%
Top 53.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

corydolphin/flask-cors version 4.0.1 contains an improper regex path matching vulnerability. The plugin prioritizes longer regex patterns over more specific ones when matching paths, which can lead to less restrictive CORS policies being applied to sensitive endpoints. This mismatch in regex pattern priority allows unauthorized cross-origin access to sensitive data or functionality, potentially exposing confidential information and increasing the risk of unauthorized actions by malicious actors.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-41

Affected Products

flask-corsflask-cors project
Library
OSS Libraries / pypi
flask-corsPyPIOSS Libraries
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
PyPiСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
corydolphin/flask-corscorydolphin
Library
OSS Libraries / generic-library
flask-cors projectoss-projectOSS Librariesaka flask-cors
pypipackage-ecosystemOSS Libraries
ооо «ред софт»commercialRUOperating Systemsaka red soft
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
corydolphinoss-projectOSS Librariesaka corydolphin

Exploitability

Official Patch Available

References

https://huntr.com/bounties/403eb1fc-86f4-4820-8eba-0f3dfae9f2b4
huntr.com
https://lists.debian.org/debian-lts-announce/2025/05/msg00049.html
lists.debian.org
https://nvd.nist.gov/vuln/detail/CVE-2024-6839
nvd.nist.gov
and 5 more references View all →

Timeline

Published
Mar 20, 2025
Last Updated
Nov 3, 2025

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